Safety sheave block



Nov. 29, 1927. 1,650,903

w. H, MCKISSICK SAFETY SHEAVE BLOCK Filed May 5. 1926 2 Sheets-Shed l lN Vii N TOR NOV. 29, 1927.

' W. H. MCKISSICK SAFETY SHEAVE BLOCK Filed May 5. 1926 2 Sheets-Shed 2 WILLIAM H. Mcmssrcrc;

I asa na rams.

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onetime, OKLAHOMA.

SAFETY sinnavn" BLOCK.

This inventionrelates tonew and. useful improvements in safety sheave blocks.

Theobject of the. invention is to provide" a bloclrwith ren'iovable side guard members, whereby the cablelinesareenclosedand the fingers of the worlnnan are protected, but at the same timesaid block may be easily opened for the removal or insertion of cable lines. a r

A further object of the invention is to provide a block housing having open sides and upright guard plates removably mounted in said open sides in a simple and efiicient manner.

Another object of the i vention is to pro vide spacer members co-acting with flanges at the upper ends of the guard members to a separate the lines of cable and to prevent the hands of the workman being drawn into the top of the block.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specilication and by reference to the accompanying drawings. .in which an example of the invention is shown and wherein:

Fig. 1 is a perspective view of a block constructed in accordance with my invention,

Fig. 2 is an elevation of one of the guard plates,

Fig. 3 is detail of the lower becltet,

Fig. l is a horizontal cross-sectional view, and

Fig. 5 is a transverse vertical sectional view.

In the drawings the numeral 10 designates a central vertical partition plate from which upright side bars 11 are spaced by spacer members or blocks 12. Side or cover plates 13 are fastened to the outer ends of the blocks against the side bars and to which they may also be secured. The parts 10, ll, 12 and 13. form a housing through the upper end of which a beclzet bolt l l passes. The ears of an upper becket 15 are pivoted on the said bolt on each side of the plate 10.

A lower becket bolt 16 passes through the lower end of the housing and a lower becket is pivoted thereon. This becket comprises a. hook member 17 and a keeper member 20, the latter having spaced ears 19 at its lower end receiving an ear 18 on'the end of the bill of the hook member. A locking bolt 21 is passed through the ears. When it is desired 1926. Serial No. M36374.

lowerend rolled toform an integral sleeve- 23. A. bolt24 extending;throu i} tl-reaplates a 13 also passes through the sleeve and is fastened by a nut 25. The bolt is located at the lower end of the side edges of said plates. The plates 18 arebeveled at their upper and lower ends to form inclined shoulders eX- tending to said side edges.

Each plate has laterally extending lugs 26 at its upper end engaging in notches 27 in the upper shoulders of the plates 13. The bolts 2-1 and the notches 27 are set inward from the edges of the plates 13 and this positions the guard plates 22 between the plates 13.

At the upper end of each plate 22 an in clined flange 28 is bent inwardly along the shoulders and directed toward the partition plate 10, leaving only enough space for the lines of cable to pass on each side of the blocks 12. An axle 29 extends through the center of the housing and sheaves 30 are journaled thereon on each side of the partition plate 10 Within the housing and below the flanges 28 and blocks 12.

When it is desired to insert or remove cable lines from the housing, the guard "plates may be readily removed upon withdrawal of bolts 24:. l/Vhen the plates 22 are in place, the sides of the housing are completely closed and a safe block is had.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

What I claim, is:

1. In a safety sheave block, a block housing having a sheave therein and comprising side plates having notches at their upper ends, vertical guards having lugs at their upper ends engaging in said notches, sleeves on the lower ends of the guards, and bolts mounted on the plates and passing through said sleeves, the guards being disposed between the plates.

2. In a safety sheave block, a block housing having asheave therein and comprising side plates having notches at their upper ends, vertical guards having lugs at their upright supports, a becket attached to the upper ends of said supports, side plates attached to said upright supports and cover ing the same, a sheave journaled between the supports and the side plates, and upright guard plates reniovably mounted between the vertical edges of the side plates, whereby said guard plates are shielded and protected by the side plates, the guard plates covering the cable line on both sides of the sheave.

4. In a safety sheave block, a plurality of upright supports, a. becket from which said supports are suspended, side plates attached to the outer sides of the supports and extending to each side of said supports, spacer blocks disposed between the upper ends of the side plates and relatively on each side of the becket, vertical guard plates removably mounted along the vertical edges of the side plates and each guard plate having an inturned flange at its top entirely spaced from the spacer blocks, and a sheave journaled between the supports and the side plates.

In testimony whereof I afiix my signature.

WILLIAM H. MOKISSICK. 

